Stability analysis of rice (Oryza sativa) hybrids and their parents
2011
SAIDAIAH, P | KUMAR, S SUDHEER | RAMESHA, M S
unknown. An experiment was conducted to evaluate 115 rice (Oryza sativa L.) hybrids, their parents (5 cyto plasmic male sterile lines and 23 restorer parents) and four checks for their stability at three different locations, viz Hyderabad, Warangal and Jagtial representing three different agro-climatic zones of Andhra Pradesh. The study indicated that a substantial portion of G × E interaction was due to the linear component for days to 50% flowering, productive tillers/ plant, panicle weight, filled grains/panicle, grain yield/plant and productivity/day. Hybrids were less predictable than the parents for days to 50% flowering, productive tillers/plant, panicle weight and grain yield/plant. Several highyielding hybrids and parents were identified for general (‘CRMS 32A’ × ‘RPHR 517’ and ‘APMS 6A’ × ‘RPHR 118’), favourable (‘PUSA 5A’ × ‘RPHR 1096’, ‘IR 58025A’ × ‘KMR 3’ and ‘CRMS 32A’ × ‘GQ 120’) and poor (‘CRMS 32A’ × ‘GQ 70’) environments. Thus the present study confirmed that stable hybrids were developed from stable parents but stable parents need not necessarily generate stable hybrids.
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